Stroker ??
Thread Starter
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Stroker ??
I am looking at stroker kits for a SC'd motor. Let's say I am going to stick with stock heads and add an LS6 cam. . .
a. Should I also have the bore increased?
b. What is the MAX one can increase stroke on a stock LS1?
Finally, does anyone know the formula for calculating Cu. in? What are the stock LS1 statistics (stroke and bore)?
a. Should I also have the bore increased?
b. What is the MAX one can increase stroke on a stock LS1?
Finally, does anyone know the formula for calculating Cu. in? What are the stock LS1 statistics (stroke and bore)?
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
Re: Stroker ?? (hogurt)
I hear an all bore motor is the ticket for lots of high RPM driving, but the high bore and long stroke seems to work fine for the C5-R!
One day I'll have a 427 in the Z. :cheers:
[Modified by Cobra4B, 10:20 PM 1/8/2004]
One day I'll have a 427 in the Z. :cheers:
[Modified by Cobra4B, 10:20 PM 1/8/2004]
Le Mans Master
Joined: Sep 2001
Posts: 8,840
Likes: 43
From: State of Confusion.
Re: Stroker ?? (hogurt)
This is just my opinion, but for the money that you'll spend on a stroker, would you get more performance putting that towards heads, rods (or at least ARP bolts), pistons, and then turn up the boost? Just my .02, and usually you get what you pay for! :D
Melting Slicks
Joined: Oct 2002
Posts: 2,855
Likes: 0
Re: Stroker ?? (hogurt)
You can bore (or resleave) the c5r block to 4.155 (no sure about a resleaved block but I think its the same) I have heard of a few guys going with a 4.250 stroke but have heard no success stories, most go with a 4.0 for a higher reving engine my 436ci is a 4.125 stroke and a 4.1 bore, I could have gone 4.125 on the bore (441ci) but it is really pushing as there is virtually nothing left between the cylinders. I simply wanted an NA car without the plumbing etc my blower motor put out more power even at low boost---
Thread Starter
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Re: Stroker ?? (NEPTUNEBILL)
Well, to be very clear. . .
Instead of purchasing forged parts for the stock engine, I can buy a stroker package for the same (or less) and it too consists of all forged parts. . .
From what I can tell, there is NO advantage to staying at 350cu.in. Instead, I may as well add a stroker package (w/ no bore) and pick up the extra inches.
In case I wasn't clear, the SC is staying. I will continue to run boost (of course with forged internals, I can up the boost).
Instead of purchasing forged parts for the stock engine, I can buy a stroker package for the same (or less) and it too consists of all forged parts. . .
From what I can tell, there is NO advantage to staying at 350cu.in. Instead, I may as well add a stroker package (w/ no bore) and pick up the extra inches.
In case I wasn't clear, the SC is staying. I will continue to run boost (of course with forged internals, I can up the boost).
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Instructor
Joined: Dec 2002
Posts: 183
Likes: 0
From: Shelby Twp MI
Re: Stroker ?? (hogurt)
My .02, Watch yourself in as far as increasing your stroke too much. As your stroke increases so does the angle of your connecting rod to wrist pin center. That's a lot of stress on the rods and pins. Kinda like pushing more sideways on the piston versus up and down. Strokers give you more torque than horses and as they say "Torque is what gets you down the road" :thumbs:
Again my .02
KJ
Forgot to mention to watch your compression ratio also. Too much compression as I have or more and the S/C loses its worth. .02 more!
[Modified by UAWDES1, 6:22 PM 1/9/2004]
Again my .02
KJ
Forgot to mention to watch your compression ratio also. Too much compression as I have or more and the S/C loses its worth. .02 more!
[Modified by UAWDES1, 6:22 PM 1/9/2004]
Burning Brakes
Joined: Jul 2003
Posts: 867
Likes: 0
From: Houston TX
Re: Stroker ?? (UAWDES1)
Some things you might want to consider.
Some resleved blocks have had problems in high boost and N2o applications.
You can use a steel block 6.0 and go with a 4, 4.030, or 4.060
You can use a stock stroke or 4, 4.125, or up to 4.250.
This can give you 408-434 stroker.
Man with boost that should be a beast !
Good luck !
Some resleved blocks have had problems in high boost and N2o applications.
You can use a steel block 6.0 and go with a 4, 4.030, or 4.060
You can use a stock stroke or 4, 4.125, or up to 4.250.
This can give you 408-434 stroker.
Man with boost that should be a beast !
Good luck !
Thread Starter
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Re: Stroker ?? (MTI 427 Roadster)
I appreciate all of the input, but I really don't see an answer to my question.
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
Drifting
Joined: Apr 2003
Posts: 1,764
Likes: 31
From: Fort Collins CO
Re: Stroker ?? (hogurt)
I appreciate all of the input, but I really don't see an answer to my question.
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
Much more common, and virtually trouble-free, it seems, is a 4" stroke. on a stock bore, that would give you a 382 cid engine.
Here is a list of some common combinations: http://www.jakelatham.com/c5/misc/faq.shtml#1-15
a C5R uses a 4.125" bore, with a 4" stroke for 427ci.
You calculate bore using the formula for the area of a cylinder. pi*radius^2 * height.
so, that's 3.141 * (bore / 2)^2 * stroke
then multiply by number of cylinders = 8.
-Jake
[Modified by JakeL, 7:06 PM 1/9/2004]
Team Owner
Joined: Apr 2001
Posts: 26,794
Likes: 613
From: Elmhurst, IL (West Suburb of Chicago) & Home of MEGA Horsepower
St. Jude Donor '06
Re: Stroker ?? (JakeL)
[QUOTE]I appreciate all of the input, but I really don't see an answer to my question.
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
The max stroke that is commonly run is 4.125", but motors built on a stock bore (or even with a 4" bore and larger) seem to be more prone to oil burning problems and other issues. It also requires a bit of clearancing to the block, if I remember correctly. This would give you 395cid on a stock bore engine.
Much more common, and virtually trouble-free, it seems, is a 4" stroke. on a stock bore, that would give you a 382 cid engine.
Here is a list of some common combinations: http://www.jakelatham.com/c5/misc/faq.shtml#1-15
a C5R uses a 4.125" bore, with a 4" stroke for 427ci.
You calculate bore using the formula for the area of a cylinder. pi*radius^2 * height.
so, that's 3.141 * (bore / 2)^2 * stroke
then multiply by number of cylinders = 8.
-Jake
Great info from JakeL and i agree with him 1000%!!! :iagree:
What is the max stroke I can run with a stock block and NO bore? Once I see how many cubes I can get with stroke only, I will determine if I also need to bore the block.
Thanks,
R
The max stroke that is commonly run is 4.125", but motors built on a stock bore (or even with a 4" bore and larger) seem to be more prone to oil burning problems and other issues. It also requires a bit of clearancing to the block, if I remember correctly. This would give you 395cid on a stock bore engine.
Much more common, and virtually trouble-free, it seems, is a 4" stroke. on a stock bore, that would give you a 382 cid engine.
Here is a list of some common combinations: http://www.jakelatham.com/c5/misc/faq.shtml#1-15
a C5R uses a 4.125" bore, with a 4" stroke for 427ci.
You calculate bore using the formula for the area of a cylinder. pi*radius^2 * height.
so, that's 3.141 * (bore / 2)^2 * stroke
then multiply by number of cylinders = 8.
-Jake
Great info from JakeL and i agree with him 1000%!!! :iagree:
Thread Starter
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Re: Stroker ?? (don7790)
This is great news. This means I can go with a 382 stroker (kit) and I should only need a few more things (like a fuel pump and larger injectors) to have my car back on the road.
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
Team Owner
Joined: Apr 2001
Posts: 26,794
Likes: 613
From: Elmhurst, IL (West Suburb of Chicago) & Home of MEGA Horsepower
St. Jude Donor '06
Re: Stroker ?? (hogurt)
This is great news. This means I can go with a 382 stroker (kit) and I should only need a few more things (like a fuel pump and larger injectors) to have my car back on the road.
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
Melting Slicks
Joined: Dec 2000
Posts: 2,118
Likes: 1
Re: Stroker ?? (NEPTUNEBILL)
The C5R block comes unhoned at 4.117" and can be safely bored to 4.160...doesn't need resleeving. With a 4.155" bore and a 4.155 stroke (Hank 's E4340 Billet crank) 6.125" rods gives almost 451 ci. Cylinder deck height is 9.240" This motor was recently built up in October Chevy High Performance Mag and made over 575 lb-ft of torque on gas. :cheers:
[Modified by HIGHRPM, 9:53 PM 1/10/2004]
[Modified by HIGHRPM, 9:53 PM 1/10/2004]
Thread Starter
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Re: Stroker ?? (MTI 427 Roadster)
This is great news. This means I can go with a 382 stroker (kit) and I should only need a few more things (like a fuel pump and larger injectors) to have my car back on the road.
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
I'll take a stab at it and say that you should be putting down a solid 500rwhp but considerable more if you would match the proper heads and cam to work in perfect harmony with the big cubes and 10psi. :cheers: :crazy: :chevy :flag
Any guesses as to the HP on a 382 w/ stock LS1 heads, LS6 cam and 10psi?
This will be an interesting experiment! :thumbs:
I'll take a stab at it and say that you should be putting down a solid 500rwhp but considerable more if you would match the proper heads and cam to work in perfect harmony with the big cubes and 10psi. :cheers: :crazy: :chevy :flag
Next winter, LT's heads and custom cam. . . :thumbs:
